The resistance to acidic and alkaline environments of endodontic pathogen Enterococcus faecalis

K. Nakajo; Y. Iwami; R. Komori; S. Ishikawa; T. Ueno; Y. Suzuki; N. Takahashi

doi:10.1016/j.ics.2005.06.060

The resistance to acidic and alkaline environments of endodontic pathogen Enterococcus faecalis

K. Nakajo, Y. Iwami, R. Komori, S. Ishikawa, T. Ueno, Y. Suzuki, N. Takahashi

Research output: Contribution to journal › Review article › peer-review

4 Citations (Scopus)

Abstract

The aim of this study was to investigate the acid- and alkali-resistance and its biochemical mechanism of endodontic pathogen Enterococcus faecalis and to compare with those of other oral streptococci. The acid- and alkali-resistance of each strain was estimated as follows: 1) the growth ability in the complex medium, 2) the cell durability to leakage of pre-loaded BCECF and 3) the intracellular pH (pHin) stability. The results indicate that E. faecalis is not only acid-resistant similar to Streptococcus mutans but more alkali-resistant than S. mutans. This study suggests that the acid- and alkali-resistance of E. faecalis is derived from the membrane durability and impermeability against acid and alkali. Such characteristics of E. faecalis could be the reasons why E. faecalis is frequently isolated from both acidic caries lesions and persistent infected root canals where calcium hydroxide medicaments are ineffective.

Original language	English
Pages (from-to)	191-192
Number of pages	2
Journal	International Congress Series
Volume	1284
DOIs	https://doi.org/10.1016/j.ics.2005.06.060
Publication status	Published - 2005 Sep

Keywords

Acid-resistance
Alkali-resistance
E. faecalis
Endodontic pathogen

ASJC Scopus subject areas

Medicine(all)

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10.1016/j.ics.2005.06.060

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title = "The resistance to acidic and alkaline environments of endodontic pathogen Enterococcus faecalis",

abstract = "The aim of this study was to investigate the acid- and alkali-resistance and its biochemical mechanism of endodontic pathogen Enterococcus faecalis and to compare with those of other oral streptococci. The acid- and alkali-resistance of each strain was estimated as follows: 1) the growth ability in the complex medium, 2) the cell durability to leakage of pre-loaded BCECF and 3) the intracellular pH (pHin) stability. The results indicate that E. faecalis is not only acid-resistant similar to Streptococcus mutans but more alkali-resistant than S. mutans. This study suggests that the acid- and alkali-resistance of E. faecalis is derived from the membrane durability and impermeability against acid and alkali. Such characteristics of E. faecalis could be the reasons why E. faecalis is frequently isolated from both acidic caries lesions and persistent infected root canals where calcium hydroxide medicaments are ineffective.",

keywords = "Acid-resistance, Alkali-resistance, E. faecalis, Endodontic pathogen",

author = "K. Nakajo and Y. Iwami and R. Komori and S. Ishikawa and T. Ueno and Y. Suzuki and N. Takahashi",

year = "2005",

month = sep,

doi = "10.1016/j.ics.2005.06.060",

language = "English",

volume = "1284",

pages = "191--192",

journal = "International Congress Series",

issn = "0531-5131",

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}

TY - JOUR

T1 - The resistance to acidic and alkaline environments of endodontic pathogen Enterococcus faecalis

AU - Nakajo, K.

AU - Iwami, Y.

AU - Komori, R.

AU - Ishikawa, S.

AU - Ueno, T.

AU - Suzuki, Y.

AU - Takahashi, N.

PY - 2005/9

Y1 - 2005/9

N2 - The aim of this study was to investigate the acid- and alkali-resistance and its biochemical mechanism of endodontic pathogen Enterococcus faecalis and to compare with those of other oral streptococci. The acid- and alkali-resistance of each strain was estimated as follows: 1) the growth ability in the complex medium, 2) the cell durability to leakage of pre-loaded BCECF and 3) the intracellular pH (pHin) stability. The results indicate that E. faecalis is not only acid-resistant similar to Streptococcus mutans but more alkali-resistant than S. mutans. This study suggests that the acid- and alkali-resistance of E. faecalis is derived from the membrane durability and impermeability against acid and alkali. Such characteristics of E. faecalis could be the reasons why E. faecalis is frequently isolated from both acidic caries lesions and persistent infected root canals where calcium hydroxide medicaments are ineffective.

AB - The aim of this study was to investigate the acid- and alkali-resistance and its biochemical mechanism of endodontic pathogen Enterococcus faecalis and to compare with those of other oral streptococci. The acid- and alkali-resistance of each strain was estimated as follows: 1) the growth ability in the complex medium, 2) the cell durability to leakage of pre-loaded BCECF and 3) the intracellular pH (pHin) stability. The results indicate that E. faecalis is not only acid-resistant similar to Streptococcus mutans but more alkali-resistant than S. mutans. This study suggests that the acid- and alkali-resistance of E. faecalis is derived from the membrane durability and impermeability against acid and alkali. Such characteristics of E. faecalis could be the reasons why E. faecalis is frequently isolated from both acidic caries lesions and persistent infected root canals where calcium hydroxide medicaments are ineffective.

KW - Acid-resistance

KW - Alkali-resistance

KW - E. faecalis

KW - Endodontic pathogen

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UR - http://www.scopus.com/inward/citedby.url?scp=33646443977&partnerID=8YFLogxK

U2 - 10.1016/j.ics.2005.06.060

DO - 10.1016/j.ics.2005.06.060

M3 - Review article

AN - SCOPUS:33646443977

VL - 1284

SP - 191

EP - 192

JO - International Congress Series

JF - International Congress Series

SN - 0531-5131

ER -

The resistance to acidic and alkaline environments of endodontic pathogen Enterococcus faecalis

Abstract

Keywords

ASJC Scopus subject areas

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